The navigation pane, the left pane of Item Explorer, lets you browse vaults and item folders.
It lists the vaults 
, item folders 
, and items 
to which you have access.
The first time you click a vault during your session, you are prompted to log in. Type your User name and Password for the vault, then click Log In. You can expand the vault to see top-level items and item folders. Expand folders to see items and subfolders.
The navigation pane does not show item structure (hierarchy). Use the main pane to view item structure.
You can right-click vaults, folders, and items in the navigation pane and select operations.